Fuse-plug.



JLH. HANSON.

FUSE PLUG. APPLICATION FILED JAN. 18. 1915."

' Patented June 6,1916.-

, iunrrnn sr rns PATENT OFFICE.

eTOHN H. HANSGN, 011 CHIGAGU, ILLINOIS, ASSTGNOR F ONE-THIRD TO $TEIPHENH.

LOUGHMAN AND own-rum ro vran ALLAN, BOTH or cnroneo, rumors.

FUSE-PLUG.

1,1se,oso.

To all whom it may concern Be it known that 1, JOHN H. HANsoN, a

citizen of the United States, residing at a fuse plug embodying thefeatures of my invention. Fig. 2 is a view of the inner end of the plug.Fig. 3 is a sectional view taken in the lane of dotted line 33 ofFig. 1. Fig. 4c is a perspective view of one of the terminals.

The body lot the lug may be of any 16- sired form and of any suitablematenal,

such, for example, as porcelain. Within the plugis a chamber 2 and achamber 8, said chambers being separated by a part1- tion 4. lhe chamber3 is adjacent to the inner end of the plug and is small as compared withthe chamber 2. .For convenience of manufacture, the inner end portion ofthe'body is formed se" arate from the remainder of the body a consistsof a cir- 'cular portion 5 fitting against the end of the remainder 1 ofthe body. The portion 5 is secured to the body portion 1 by means ofthe" usual screw-threaded conducting shell 6, The parts 1 and 5 are heldagainst relative rotation by bosses 5 formed on the' part5 {and lyingin. recesses 1 in the body portion, 1. The chamber 3 opens uponth'eupper side of the portion 5. The partition 4: is formed integral withthe lower end of the bodyportion 1 The fuse element may be of anysuitable character, such as fuse wire, fuse ribbon, or the like. HereinI have shown a fuse wire 7. Preferably, the fuseelement is removablysecuredin place so that when the ele ment is'melted by an excessivecurrent it may be readilynteplaced. The outer end of the fuse elementliis herein shown as se cured by means of a binding screw 8% to a bracket9 which is connected to the conducting shell '6.- A wall or portion 10of the body 1 extends between the fuse element and the outer end of thebracket 9 and thus prevents an are formed within the fuse plug fromreaching the exterior of the plug. As

Specification of Letters Patent. P 9111 9 1 J 111133 6, 1916,Application filed January 18, 1915. Serial at. are,

shown in Fig. 1, an inwardly projecting shelf or ledge 11 may beprovided upon the wall 10 underneath the bracket 9.

The inner end of the fuseelement 7 is secured to a terminal 12 which isherein shown as consisting of a disk 13 having a tubular shank .1 1,said shank extending through an opening 15 in the body portion 5. Theshank 14 extends into'the chamber 3. The terminal 12 is secured to thebody 1 by means of angular lugs 16'formed out of the shank and lyingwithin the chamber 3. In the disk 13 is formed a slot 17 to' facilitatethe insertion of the fuse element 7. The inner end of the fuse elementis intended to be bent around the shank 14: in the space between thedisk 13 andthe inner end of the body. The chamber 3 is of sufficientsize to permit axial movement of the shank 14 and the lugs 16 withinsaid chamber, thereby permitting the fuse element to be compressedbetween the disk 13 and the -'inner end of the body when the plug isscrewed firmly into its socket.

In the partition 4 is an opening 18 for the passage'of the fuse element.At the lower or inner side of the partition 4 the wall of the opening 18is made rounding or flaring to facilitate the insertion of the fuse wirethrough the opening 18. Around the openingv 18 is an outwardly extendingannular lip 19. The opening 18 is of such size and shape as to permitthe fuse element to pass freely therethrough, but is not large enough topermit an arc to continue to exist between the inner end of the bracket9 and the terminal 12. The partition 4 with its restricted opening 18thus constitutes means to prevent the continued existenceof an arc inthe fuse plug, and thus obviates danger of excessive current reachingthe circuit which isprotected by the plug.

The outer end of the body 1 may be closed in any ordinary or preferredway. HcreimI have shown a screw-cap 20.

While I have described the present embodiment of my invention withconsiderable particularity, it will be understood that the,

invention is not limited to the precise form herein shown, but issubject to considerable modification within the scope of the annexedclaims.

I claim as my invention: 1. In a fuse plug, in combination, a chamberedmain body portion having a transverse partition closing the inner endthereof, a separate inner end portion having a central openingtherethrough, one end of which is enlarged and is closed by saidpartition, a

terminal device mounted in said opening and having a part engaging insaid enlarged part of said opening, a terminal device on said main bodyportion, said partition having a restricted opening therethrough, and afuse element passing through. said restricted opening and having itsends operatively connected to said terminal devices.

2. In a fuse plug, in combination, a main body portion having aninternal chamber and having a transverse partition closing the inner endof said chamber, an inner end portion abutting against said body portionand having a chamber, said partition acting to separate said chambers, ashell securing said end portion to the main body portion, a terminal onsaid end portion, said partition havinga restricted openingtherethrough, and a fuse element passing through said opening andattached at one end to said terminal, the other end of the fuse elementbeing operatively connected to said shell.

3. A fuse plug comprising two separate outer and inner body portions ofinsulating material, a circumferential metallic shell securing said bodyportions together and adapted to be screwed into a socket, a terminalcarried by the inner body portion to cooperate With a part in thereceiving socket, a partition extending completely across the interiorof the outer body portion and entirely separating such interior from theinner body portion, said partition having a restricted aperturetherethrough, and a fuse connected at one end to said terminal and atportion, a terminal carried by the inner end I portion of the body, anda fuse element electrically connected to said terminal and terminalmember and extending through the restricted opening.

5. In a fuse plug, a body comprising a main portion and an inner endportion, a screwthreaded shell securing said portions together, theinner end portion having a chamber and the main body portion having achamber and also having a transverse partition integral With and closingits inner end, said partition having a restricted opening therein, aterminal carried by the inner end portionof the body, and a fuse elementelectrically connected to the shell and to said terminal and extendingthrough the restricted opening.

In testimony whereof, I hereunto set my hand in the presence of twoWitnesses.

JOHN H. HANSON.

